2021-09-03 | Technical improvements, changes in design, printing- and other errors reserved.
15
3.3. Checking the installation
Interface
Inspection item
Inspection standard
Uplink interface
Uplink interface to connect the GE/PON
module
Check that the module is properly inserted in
the SFP+ interface
GE
.
Connection status of the uplink GE/PON
interface
Check that the
GE
indicator is normal.
Check whether the Rx power and Tx
power of the uplink GE/PON interface
module are within the rated range (vary
depending on the optical module
specifications).
Measure the value with an optical power
meter and check that the Rx power and Tx
power of the uplink GE/PON interface are
within the rated range.
Radio frequency
(RF) interface
Downstream channel frequency
Measure the downlink channel frequencies
using a spectrum analyzer and check that
each channel is enabled and the channel
frequency complies with the planned value.
Downstream output level
Measure the output level of the enabled
downstream channels using a spectrum
analyzer and check that the output level
complies with the planned value.
MER of the downstream channels
Measure the MER of the enabled downstream
channels using a spectrum analyzer and check
that the MER complies with the planned
value.
Upstream channel frequency
Check that the cable modems comes online
normally, the channels are enabled, and the
channel frequency complies with the planned
value.
SNR of the enabled uplink channel
Check that the CM comes online normally by
commands conducted over the CC8800D.
Check the preset value of radio-frequency
power for each enabled uplink channel
(the CM comes online normally).
Measure the output level of the enabled
upstream channels and check that the cable
modems comes online normally by commands
conducted over the CMTS 2-00.
